QR code Augmented reality (QRAR) is an AR doesn't require pre-registration, has 107089 combination ID-encodedandean be used on the public AR applications. From some previous research, the 6DOF tracking method less accurate, requires only small computation power and unstable marker, we propose merging a conventional marker with QR code, but it will has noise on the QR code finder patter (QRFP) under perspective distortion, in order to keep detecting so we propose a backpropagation method preceded by feature extraction with low level image processing. Method that we had been proposed achieved an accurate 6DOF, runs at 35.41 fps and resulting stable markers as a conventional marker.